13531202320 has 40 divisors (see below), whose sum is σ = 31509244440. Its totient is φ = 5404016640.

The previous prime is 13531202303. The next prime is 13531202323. The reversal of 13531202320 is 2320213531.

It can be written as a sum of positive squares in 4 ways, for example, as 2004173824 + 11527028496 = 44768^2 + 107364^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 13531202291 and 13531202300.

It is not an unprimeable number, because it can be changed into a prime (13531202323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80655 + ... + 183214.

It is an arithmetic number, because the mean of its divisors is an integer number (787731111).

Almost surely, 2^13531202320 is an apocalyptic number.

13531202320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531202320 is an abundant number, since it is smaller than the sum of its proper divisors (17978042120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13531202320 is a wasteful number, since it uses less digits than its factorization.

13531202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264523 (or 264517 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 13531202320 its reverse (2320213531), we get a palindrome (15851415851).

The spelling of 13531202320 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, three hundred twenty".